Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 78, Issue 10, Pages -Publisher
SPRINGER
DOI: 10.1140/epjc/s10052-018-6295-x
Keywords
-
Categories
Funding
- CNRS/IN2P3 in France
- RFBR in Russia
- STFC in the UK
- NSF in the USA
- STFC [ST/K002813/1, ST/N000455/1, ST/N000374/1, ST/I005858/1, ST/K001426/1, ST/R000034/1, SuperNEMO, ST/S001883/1, ST/K002856/1, ST/H000615/1, ST/H001166/2, ST/N001346/1, ST/S006370/1, ST/K003488/1, ST/M002764/1, ST/K00140X/1, ST/K002864/1, ST/M001180/1, ST/M006476/1, ST/K001396/1] Funding Source: UKRI
Ask authors/readers for more resources
Using data from the NEMO-3 experiment, we have measured the two-neutrino double beta decay (2 nu beta beta) half-life of Se-82 as T-1/2(2 nu) = [9.39 +/- 0.17 (stat) +/- 0.58 (syst)] x 10(19) y under the single-state dominance hypothesis for this nuclear transition. The corresponding nuclear matrix element is vertical bar M-2 nu vertical bar = 0.0498 +/- 0.0016. In addition, a search for neutrinoless double beta decay (0 nu beta beta) using 0.93 kg of Se-82 observed for a total of 5.25 y has been conducted and no evidence for a signal has been found. The resulting half-life limit of T-1/2(0 nu) > 2.5 x 10(23) y (90% C.L.) for the light neutrino exchange mechanism leads to a constraint on the effective Majorana neutrino mass of < m(nu)> < (1.2-3.0) eV, where the range reflects 0 nu beta beta nuclear matrix element values from different calculations. Furthermore, constraints on lepton number violating parameters for other 0 nu beta beta mechanisms, such as right-handed currents, majoron emission and R-parity violating supersymmetry modes have been set.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available